On the Nanoscale Mapping of the Mechanical and Piezoelectric Properties of Poly (L-Lactic Acid) Electrospun Nanofibers

The effect of the post-annealing process on different properties of poly (L-lactic acid) (PLLA) nanofibers has been investigated in view of their use in energy-harvesting devices. Polymeric PLLA nanofibers were prepared by using electrospinning and then were thermally treated above their glass trans...

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Bibliographic Details
Published in:Applied sciences 2020-01, Vol.10 (2), p.652
Main Authors: Cuong, Nguyen Thai, Barrau, Sophie, Dufay, Malo, Tabary, Nicolas, Da Costa, Antonio, Ferri, Anthony, Lazzaroni, Roberto, Raquez, Jean-Marie, Leclère, Philippe
Format: Article
Language:English
Subjects:
Aluminum
Annealing
Chemical Sciences
contact mechanics
Crystal structure
Crystallinity
electrospinning
Energy harvesting
Glass substrates
Glass transition
Indium tin oxides
intermodulation afm
Investigations
Lactic acid
Material chemistry
Mechanical properties
Microscopy
Morphology
Nanofibers
Nanostructured materials
peakforce quantitative nanomechanical property mapping
Phase transitions
piezoresponse force microscopy
poly (l-lactic acid)
Polylactic acid
Polymers
Spectrum analysis
Viscoelasticity
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Summary:The effect of the post-annealing process on different properties of poly (L-lactic acid) (PLLA) nanofibers has been investigated in view of their use in energy-harvesting devices. Polymeric PLLA nanofibers were prepared by using electrospinning and then were thermally treated above their glass transition. A detailed comparison between as-spun (amorphous) and annealed (semi-crystalline) samples was performed in terms of the crystallinity, morphology and mechanical as well as piezoelectric properties using a multi-technique approach combining DSC, XRD, FTIR, and AFM measurements. A significant increase in the crystallinity of PLLA nanofibers has been observed after the post-annealing process, together with a major improvement of the mechanical and piezoelectric properties.
ISSN:2076-3417
2076-3417
DOI:10.3390/app10020652